Epson MX-80 Technical Manual page 44

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(2) Dismounting of control circuit board

The control circuit board is regarded as the heart of the electric circuit block of the

MX-80. and is equipped with a number of precision circuit components, Therefore,

carefully dismount the control circuit board as follows.

STEP 1. Unplug the connector © extending from the power transformer to the control

circuit board and disconnect the frame ground wire (2) extending from the line

filter to the control circuit board,(See Fig. 3.5,)

STEP 2, Unplug the connector @ extending from the heat sink to the control circuit

board, and remove the screw ©secured to the chassis for collector heat dis

sipation of the power supply, circuit. (See Fig. 3.5.)

STEP 3. Remove the screws (5) securing the control circuit board.

STEP 4, Unhook the control circuit board from the lower case (2 places),

STEP 5. Remove the control circuit board.

112

Fig, 3.5

Removal of Control Circuit Board

NOTE: Be sure to keep the removed screws in proper storage to prevent them from missing.

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